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NXS-GRX-SLE · Western Africa · Regions

Western Area

First-level unit, Sierra Leone: people, area, the units inside and neighbours, with risk values when released.

Page GRX-SLE-REdition Baseline Edition 2026Evidence close 2026-09-30ISO SLE / SLStatus UN member stateValues not yet publishedMethod v1.0.0-draft
1,865,873
people (GHSL 2025)
689 km²
area
21.5%
of Sierra Leone
2
units inside

01نقشہ

Inside Western Area

The 2 ADM2 units of Western Area.

FIG 1 · 2 units inside Western Area
Loading the map

Units rise with people per km² · GHSL 2025 raster · terrain · ADM1 ADM2Risk values when released
Lowest fifthLow fifthMiddle fifthHigh fifthHighest fifthNo data
Column height and colour show people per km² by unit, in quantile fifths among the units shown (the key on the map gives the breaks); units with no people on the grid are grey, not the lowest class; the raster beneath is the GHSL 2025 population grid. Source observations, not index values. Choose a humanitarian figure from the list to colour and raise the units by it; each figure shows its source on the unit page. Select a unit to drill into the units inside it; the path above the map climbs back.
02Figures

People, area and density

Source observations from open grids summed inside the boundary; not index values.

People · GHSL 2025

1,865,873

21.5% of Sierra Leone.

People · WorldPop 2025

1,106,424

-41% against GHSL; the two grids differ in method.

رقبہ

689 km²

2,708 people per km².

کوڈ

SL-W

Subdivision code as carried by the boundary source.

Low coastal zone

189,973

people on land at or below 10 m, 10.2% of the unit (GEBCO 2024 and GHSL 2025).

03Units

2 units inside Western Area

Each unit has its own page.

Boundary licences: Creative Commons Attribution 3.0 Intergovernmental Organisations (CC BY 3.0 IGO)

Unit کوڈ People (GHSL) People (WorldPop) Area km² Per km² Share Coast ≤ 10 m
Western Area Rural – 482,154 644,866 614.9 784 25.8% 66,982
Western Area Urban – 1,383,719 461,558 74.31 18,621 74.2% 122,991
04زد

Open exposure layers

Count of H3 resolution-3 cells whose centre falls in the unit and that carry each Natural Earth layer.

Urban areas
None at this resolution
بندرگاہیں
None at this resolution
Airports
None at this resolution
Major roads
None at this resolution
Railways
None at this resolution
Rivers and lakes
None at this resolution
05خطرہ

Risk values

Values when released. Subnational risk values for Western Area publish with the edition from The Global Risks Index. Until then, run a scenario on open data for Sierra Leone.
06Neighbours

Neighbouring units

07ماخذات

Sources, credits and licences

ADM1 boundaries
geoBoundaries (William & Mary geoLab), gbOpen SLE ADM1, source: Government of Sierra Leone, OCHA ROWCA, licence: Creative Commons Attribution 3.0 Intergovernmental Organisations (CC BY 3.0 IGO) · source · represents 2014
ADM2 boundaries
geoBoundaries (William & Mary geoLab), gbOpen SLE ADM2, source: Government of Sierra Leone, OCHA ROWCA, licence: Creative Commons Attribution 3.0 Intergovernmental Organisations (CC BY 3.0 IGO) · source · represents 2017
ADM3 boundaries
geoBoundaries (William & Mary geoLab), gbOpen SLE ADM3, source: openAfrica, geoBoundaries, licence: Creative Commons Attribution 4.0 (CC BY 4.0) · source · represents 2016
ADM4 boundaries
geoBoundaries (William & Mary geoLab), gbOpen SLE ADM4, source: openAfrica, licence: Creative Commons Attribution 4.0 (CC BY 4.0) · source · represents 2016
Basemap
OpenFreeMap © OpenMapTiles (CC BY 4.0) · data © OpenStreetMap contributors (ODbL 1.0). Vector tiles requested by the reader’s browser, unmodified; the map falls back to plain land and sea when the host does not answer.
Terrain
Terrain Tiles (Mapzen, AWS Open Data), compiled from SRTM and other public elevation sources (NASA, USGS, ETOPO1, GMTED, EU-DEM under the Copernicus programme, Geoscience Australia, Kartverket, INEGI, LINZ, data.gov.uk). Display relief, not survey data.
People
GHSL 2025 population grid, European Commission Joint Research Centre (CC BY 4.0), shown at 0.05° and summed per unit; WorldPop 2025 (CC BY 4.0) as a second estimate. Units smaller than a grid cell take the density of the cell under them.
ممالک
Natural Earth (public domain).
Elevation
GEBCO Compilation Group (2024) GEBCO 2024 Grid (public domain), reduced to 0.05°: the share of each cell’s land at or below 10 m, weighted by GHSL 2025 people for the low coastal zone.
Position
Boundaries are shown for location only and take no position on any boundary, name or status.